检索结果-内蒙古大学图书馆

arXiv 2019年

作者： Empante, Thomas A. Martinez, Aimee Wurch, Michelle Zhu, Yanbing Geremew, Adane K. Yamaguchi, Koichi Isarraraz, Miguel Rumyantsev, Sergey Reed, Evan J. Balandin, Alexander A. Bartels, Ludwig Department of Chemistry and Material Science & Engineering Program University of California - Riverside RiversideCA92521 United States Department of Materials Science and Engineering Stanford University StanfordCA94304 United States Nano-Device Laboratory Department of Electrical and Computer Engineering University of California RiversideCA92521 United States Center for Terahertz Research and Applications Institute of High Pressure Physics Polish Academy of Sciences Warsaw01-142 Poland

Micron-scale single-crystal nanowires of metallic TaSe3, a material that forms -Ta-Se3-TaSe3- stacks separated from one another by a tubular van der Waals (vdW) gap, have been synthesized using chemical vapor deposition (CVD) on a SiO2/Si substrate, in a process compatible with semiconductor industry requirements. Their electrical resistivity was found unaffected by downscaling from the bulk to as little as 7 nm in width and height, in striking contrast to the resistivity of copper for the same dimensions. While the bulk resistivity of TaSe3is substantially higher than that of bulk copper, at the nanometer scale the TaSe3wires become competitive to similar-sized copper ones. Moreover, we find that the vdW TaSe3nanowires sustain current densities in excess of 108A/cm2and feature an electromigration energy barrier twice that of copper. The results highlight the promise of quasi-onedimensional transition metal trichalcogenides for electronic interconnect applications and the potential of van der Waals materials for downscaled electronics. Copyright © 2019, The Authors. All rights reserved.

关键词： Van der Waals forces

来源：评论

学校读者我要写书评

暂无评论

Strength improvement of linerboard by wet-end application of sludge and black liquor

引用

Palpu Chongi Gisul/Journal of Korea Technical Association of the Pulp and Paper Industry 2018年第4期50卷 141-148页

作者： Choi, Kyoung-Hwa Lee, Jae-Hun Cho, Byoung-Uk Program of Paper Science and Engineering Division of Forest Material Science and Engineering College of Forest and Environmental Sciences Kangwon National University Chunchon Korea Republic of Changgang Institute of Paper Science and Technology Kangwon National University Chunchon Korea Republic of

In this study, effects of the wet-end addition of sludge and black liquor on strength properties of linerboard were investigated. Handsheets were prepared with old corrugated container (OCC) stock received from a linerboard mill and various dosages of sludge and black liquor based on dry pulp weight were added to the OCC stock with flocculants. Strength of OCC handsheet was initially increased with the addition of sludge without flocculants and black liquor and then passed through a maximum at 10% sludge addition. Without sludge, addition of flocculants into the OCC stock improved paper strength. However, paper strength was significantly decreased with sludge addition and the use of flocculants could not improved the decreased paper strength. Addition of black liquor to sludge with flocculants improved paper strength, especially folding strength and compressive strength. Conclusively, a certain amount of paper mill sludge could be utilized for production of linerboard and the decreased paper strength with addition of sludge could be recovered by the addition of black liquor and flocculants. © 2015 Korean Technical Assoc. of the Pulp and Paper Industry. All rights reserved.

关键词： Compressive strength

来源：评论

学校读者我要写书评

暂无评论

Studies on seasonal variation of linerboard strength (III) - Effect of pulping consistency of OCC on strength of linerboard

引用

Palpu Chongi Gisul/Journal of Korea Technical Association of the Pulp and Paper Industry 2018年第4期50卷 40-46页

作者： Lee, Kwang-Seob Choi, Kyoung-Hwa Won, Heon-Seong Choi, Seong-Keong Choi, Ji-Su Ryu, Jeong-Yong Program of Paper Science and Engineering Division of Forest Material Science and Engineering College of Forest and Environmental Sciences Kangwon National University Chunchon Korea Republic of Chaggang Institute of Paper Science and Technology Kangwon National University Chuncheon24341 Korea Republic of

The strength of linerboards produced in summer was weaker than that in winter. In this study, efforts were made to increase the consistency of OCC pulp to improve the strength of linerboards produced in the summer. The pulping temperatures of summer and winter were set at 52°C and 19°C, respectively. The pulping consistency was set 5% at 19°C in winter and 5, 6, 6.5 and 7% at 52°C in summer. As a result, it has been found that the strength of the linerboard can be improved by increasing the pulping consistency. The strength of the linerboard with a pulping consistency of 6% and a pulping temperature of 52°C is similar to that of 5% and 19°C. The linerboard strength increased by more than 20% when the consistency increased to 6.5 and 7%. Therefore, an increase in pulp consistency is considered to be one of the solutions to improve the strength of linerboards in summer. © 2015 Korean Technical Assoc. of the Pulp and Paper Industry. All rights reserved.

关键词： Pulp

来源：评论

学校读者我要写书评

暂无评论

Efficiency of hydrophobization of PVA coating layer gas-grafted with palmitoyl chloride

引用

Palpu Chongi Gisul/Journal of Korea Technical Association of the Pulp and Paper Industry 2018年第4期50卷 123-134页

作者： Lee, Kwang-Seob Lee, Jae-Hun Lee, Myoung-Ku Ryu, Jeong-Yong Changgang Institute of Paper Science and Technology Kangwon National University Chuncheon24341 Korea Republic of Program of Paper Science and Engineering Division of Forest Material Science and Engineering College of Forest and Environmental Sciences Kangwon National University Chunchon Korea Republic of

Gas grafting of cellulose with fatty acid chloride based on chromatogenic chemistry is an effective method which can provide paper with hydrophobic characteristic. In case of gas grafting with fatty acid chloride, various reaction parameters such as concentration of fatty acid chloride, reaction temperature, and reaction time are very important for the optimization of the gas grafting of cellulose. In this study the gas grafting efficiency of PVA (polyvinyl alcohol) coated paper at the various conditions was evaluated by measuring water resistance such as Cobb1,800 size and water contact angle. Also quantitative analysis was performed for determining reacted or un reacted fatty acid chloride by using ATR spectroscopy and GC. As a result, when the content of palmitoyl chloride esterified with a hydroxyl group at 1% concentration of palmitoyl chloride and 1801°C of react temperature was less than 1 g/m2, Cobb1,800 size degree was less than 10 g/m2. And it was found that Cobb1,800 size value, water contact angle, ratios of absorption peak of 1,735 cm-1/3,300 cm-1, amount of grafted fatty acid was improved with increase in concentration of palmitoyl chloride, temperature, and reaction time. And there was good correlation between GC analysis, ATR spectroscopy analysis and Cobbi,8oo sizing degree for evaluation of the grafting efficiency. It should be noted that only water contact angle could not be used to evaluate the grafting efficiency. © 2015 Korean Technical Assoc. of the Pulp and Paper Industry. All rights reserved.

关键词： Gases

来源：评论

学校读者我要写书评

暂无评论

In-situ TEM Heating Experiment to Study Effects of Cyclic Thermal Gradients on Ti-6Al-4V under Additive Manufacturing Growth Conditions

引用

Microscopy and Microanalysis 2018年第S1期24卷 1932-1933页

作者： Meiyue Shao Cheng-Han Li Curtis L. Frederick Sudarsanam S. Babu Joerg R. Jinschek Department of Material Science and Engineering The Ohio State University Columbus OH. Department of Material Science and Engineering University of Tennessee Knoxville TN. Department of Mechanical Aerospace and Biomedical Engineering University of Tennessee Knoxville TN. Advanced Manufacturing Program Energy and Environmental Sciences Division Oak Ridge National Laboratory Knoxville TN.

来源：评论

学校读者我要写书评

暂无评论

Lithium-Ion Batteries: Operando Magnetometry Probing the Charge Storage Mechanism of CoO Lithium-Ion Batteries (Adv. Mater. 12/2021)

引用

Advanced materials 2021年第12期33卷

作者： Hongsen Li Zhengqiang Hu Qingtao Xia Hao Zhang Zhaohui Li Huaizhi Wang Xiangkun Li Fengkai Zuo Fengling Zhang Xiaoxiong Wang Wanneng Ye Qinghao Li Yunze Long Qiang Li Shishen Yan Xiaosong Liu Xiaogang Zhang Guihua Yu Guo-Xing Miao College of Physics Center for Marine Observation and Communications Qingdao University Qingdao 266071 China School of Physics State Key Laboratory of Crystal Materials Shandong University Jinan 250100 China State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information Technology (SIMIT) Chinese Academy of Sciences Shanghai 200050 China College of Material Science and Engineering Nanjing University of Aeronautics and Astronautics Nanjing 210016 China Materials Science and Engineering Program and Department of Mechanical Engineering The University of Texas at Austin Austin TX 78712 USA Department of Electrical and Computer Engineering & Institute for Quantum Computing University of Waterloo Waterloo ON N2L 3G1 Canada

来源：评论

学校读者我要写书评

暂无评论

Atomic-Scale Simulation of Grain Boundary Kinetics during Recrystallization

引用

MRS Online Proceedings Library 2020年第1期819卷 N6.7.1-N6.7.9页

作者： Z. Trautt M. Upmanyu Group for Simulation and Theory of Atomic-scale Material Phenomena (stAMP) USA Department of Physics Colorado School of Mines Golden USA Engineering Division Colorado School of Mines Golden USA Materials Science Program Colorado School of Mines Golden USA

We present two-dimensional molecular dynamics (MD) simulations of symmetric tilt grain boundary kinetics, driven by stored energy of deformation. The latter is introduced by prescribing a well-defined gradient in dislocation density across a flat grain boundary. Bi-crystals simulations reveal that the boundary motion, albeit jerky, increases linearly with simulation time. We also employ a control simulation to extract the driving force for motion, which then yields a unique boundary mobility. Preliminary comparisons with curvature driven boundary migration for misorientations 30° and 22.78° suggest that misorientation dependence of boundary migration is significantly less anisotropic, in turn implying that the mechanism of motion itself is different.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Revealing the Side-Chain-Dependent Ordering Transition of Highly Crystalline Double-Cable Conjugated Polymers

引用

Angewandte Chemie 2021年第48期133卷

作者： Guitao Feng Wenliang Tan Safakath Karuthedath Cheng Li Xuechen Jiao Amelia C. Y. Liu Hariprasad Venugopal Zheng Tang Long Ye Frédéric Laquai Christopher R. McNeill Weiwei Li Beijing Advanced Innovation Center for Soft Matter Science and Engineering & State Key Laboratory of Organic-Inorganic Composites Beijing University of Chemical Technology Beijing 100029 China Beijing National Laboratory for Molecular Sciences Key Laboratory of Organic Solids Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China Department of Materials Science and Engineering Monash University Wellington Road Clayton Victoria 3800 Australia King Abdullah University of Science and Technology (KAUST) KAUST Solar Center (KSC) Physical Sciences and Engineering Division (PSE) Material Science and Engineering Program (MSE) Thuwal 23955-6900 Kingdom of Saudi Arabia School of Physics and Astronomy Monash University Wellington Road Clayton Victoria 3800 Australia Ramaciotti Centre for Cryo-Electron Microscopy Monash University Clayton Victoria 3800 Australia Center for Advanced Low-dimension Materials College of Materials Science and Engineering Donghua University Shanghai 201620 P. R. China School of Materials Science and Engineering Tianjin Key Laboratory of Molecular Optoelectronic Science Tianjin University Tianjin 300350 P. R. China

We developed a series of highly crystalline double-cable conjugated polymers for application in single-component organic solar cells (SCOSCs). These polymers contain conjugated backbones as electron donor and pendant perylene bisimide units (PBIs) as electron acceptor. PBIs are connected to the backbone via alkyl units varying from hexyl (C 6 H 12 ) to eicosyl (C 20 H 40 ) as flexible linkers. For double-cable polymers with short linkers, the PBIs tend to stack in a head-to-head fashion, resulting in large d -spacings (e.g. 64 Å for the polymer P12 with C 12 H 24 linker) along the lamellar stacking direction. When the length of the linker groups is longer than a certain length, the PBIs instead adopt a more ordered packing likely via H -aggregation, resulting in short d -spacings (e.g. 50 Å for the polymer P16 with C 16 H 32 linker). This work highlights the importance of linker length on the molecular packing of the acceptor units and the influences on the photovoltaic performance of SCOSCs.

关键词： cryo-transmission electron microscopy double-cable conjugated polymers lamellar stacking single-component organic solar cells

来源：评论

学校读者我要写书评

暂无评论

Magnetic Control of Soft Chiral Phonons in PbTe

arXiv

引用

arXiv 2021年

作者： Baydin, Andrey Hernandez, Felix G.G. Rodriguez-Vega, Martin Okazaki, Anderson K. Tay, Fuyang Timothy Noe, G. Katayama, Ikufumi Takeda, Jun Nojiri, Hiroyuki Rappl, Paulo H.O. Abramof, Eduardo Fiete, Gregory A. Kono, Junichiro Department of Electrical and Computer Engineering Rice University HoustonTX77005 United States Smalley-Curl Institute Rice University HoustonTX77005 United States Instituto de Física Universidade de São Paulo SP São Paulo05508-090 Brazil Theoretical Division Los Alamos National Laboratory Los AlamosNM87545 United States Laboratório Associado de Sensores e Materiais Instituto Nacional de Pesquisas Espaciais SP São José dos Campos12201-970 Brazil Applied Physics Graduate Program Smalley-Curl Institute Rice University HoustonTX77005 United States Department of Physics Graduate School of Engineering Science Yokohama National University Yokohama240-8501 Japan Institute for Materials Research Tohoku University Sendai980-8577 Japan Department of Physics Northeastern University BostonMA02115 United States Department of Physics Massachusetts Institute of Technology CambridgeMA02139 United States Department of Physics and Astronomy Rice University HoustonTX77005 United States Department of Material Science and NanoEngineering Rice University HoustonTX77005 United States

PbTe crystals have a soft transverse optical phonon mode in the terahertz frequency range, which is known to efficiently decay into heat-carrying acoustic phonons, resulting in anomalously low thermal conductivity. Here, we studied this phonon via polarization-dependent terahertz spectroscopy. We observed softening of this mode with decreasing temperature, indicative of incipient ferroelectricity, which we explain through a model including strong anharmonicity with a quartic displacement term. In magnetic fields up to 25 T, the phonon mode splits into two modes with opposite handedness, exhibiting circular dichroism. Their frequencies display Zeeman splitting together with an overall diamagnetic shift with increasing magnetic field. Using a group-theoretical approach, we demonstrate that these observations are the result of magnetic field-induced morphic changes in the crystal symmetries through the Lorentz force exerted on the lattice ions. Thus, our study reveals a novel process of controlling phonon properties in a soft ionic lattice by a strong magnetic field. Copyright © 2021, The Authors. All rights reserved.

关键词： Magnetic fields

来源：评论

学校读者我要写书评

暂无评论

Goos-Hänchen shifts due to 2D materials with complex conductivity

arXiv

引用

arXiv 2018年

作者： Zambale, Niña Angelica F. Sagisi, Jenny Lou B. Hermosa, Nathaniel P. National Institute of Physics University of the Philippines Diliman Quezon City Philippines Material Science and Engineering Program College of Science University of the Philippines Diliman Quezon City Philippines

We investigate theoretically the Goos-Hänchen (GH) shift of a p-polarize terahertz beam incident on a 2D material surface with complex conductiv ity. Taking monolayer graphene to be the model material, we determine th dependence of GH shifts on the Fermi level and incident frequency. Bot spatial and angular GH shifts are present. For both GH shifts in genera we find that increasing the Fermi level shifts the incident angle at whic the maximum GH shifts arise. Moreover, we see that at higher frequencie the amount of beam shift decreases with the Fermi level when the inciden frequency is changed. At lower frequencies, however, the shift becomes pro portional with the Fermi level. Upon obtaining the measurable shifts, th angular GH shift dominates the spatial GH shift given appropriate exper mental parameters. Our results may pave the way for these material's us in optoelectronics devices, and fundamentally, to determine properties of 2 materials with complex conductivity. Copyright © 2018, The Authors. All rights reserved.

关键词： Fermi level

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：